1 #ifndef __PERF_CALLCHAIN_H
2 #define __PERF_CALLCHAIN_H
5 #include <linux/list.h>
6 #include <linux/rbtree.h>
10 enum perf_call_graph_mode {
30 struct callchain_node {
31 struct callchain_node *parent;
33 struct rb_node rb_node_in; /* to insert nodes in an rbtree */
34 struct rb_node rb_node; /* to sort nodes in an output tree */
35 struct rb_root rb_root_in; /* input tree of children */
36 struct rb_root rb_root; /* sorted output tree of children */
42 struct callchain_root {
44 struct callchain_node node;
47 struct callchain_param;
49 typedef void (*sort_chain_func_t)(struct rb_root *, struct callchain_root *,
50 u64, struct callchain_param *);
57 struct callchain_param {
59 enum perf_call_graph_mode record_mode;
64 sort_chain_func_t sort;
65 enum chain_order order;
67 bool branch_callstack;
70 extern struct callchain_param callchain_param;
72 struct callchain_list {
75 struct /* for TUI */ {
80 struct list_head list;
84 * A callchain cursor is a single linked list that
85 * let one feed a callchain progressively.
86 * It keeps persistent allocated entries to minimize
89 struct callchain_cursor_node {
93 struct callchain_cursor_node *next;
96 struct callchain_cursor {
98 struct callchain_cursor_node *first;
99 struct callchain_cursor_node **last;
101 struct callchain_cursor_node *curr;
104 extern __thread struct callchain_cursor callchain_cursor;
106 static inline void callchain_init(struct callchain_root *root)
108 INIT_LIST_HEAD(&root->node.val);
110 root->node.parent = NULL;
112 root->node.children_hit = 0;
113 root->node.rb_root_in = RB_ROOT;
117 static inline u64 callchain_cumul_hits(struct callchain_node *node)
119 return node->hit + node->children_hit;
122 int callchain_register_param(struct callchain_param *param);
123 int callchain_append(struct callchain_root *root,
124 struct callchain_cursor *cursor,
127 int callchain_merge(struct callchain_cursor *cursor,
128 struct callchain_root *dst, struct callchain_root *src);
131 * Initialize a cursor before adding entries inside, but keep
132 * the previously allocated entries as a cache.
134 static inline void callchain_cursor_reset(struct callchain_cursor *cursor)
137 cursor->last = &cursor->first;
140 int callchain_cursor_append(struct callchain_cursor *cursor, u64 ip,
141 struct map *map, struct symbol *sym);
143 /* Close a cursor writing session. Initialize for the reader */
144 static inline void callchain_cursor_commit(struct callchain_cursor *cursor)
146 cursor->curr = cursor->first;
150 /* Cursor reading iteration helpers */
151 static inline struct callchain_cursor_node *
152 callchain_cursor_current(struct callchain_cursor *cursor)
154 if (cursor->pos == cursor->nr)
160 static inline void callchain_cursor_advance(struct callchain_cursor *cursor)
162 cursor->curr = cursor->curr->next;
169 int record_parse_callchain_opt(const struct option *opt, const char *arg, int unset);
170 int record_callchain_opt(const struct option *opt, const char *arg, int unset);
172 int sample__resolve_callchain(struct perf_sample *sample, struct symbol **parent,
173 struct perf_evsel *evsel, struct addr_location *al,
175 int hist_entry__append_callchain(struct hist_entry *he, struct perf_sample *sample);
176 int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *node,
177 bool hide_unresolved);
179 extern const char record_callchain_help[];
180 int parse_callchain_record_opt(const char *arg);
181 int parse_callchain_report_opt(const char *arg);
182 int perf_callchain_config(const char *var, const char *value);
184 static inline void callchain_cursor_snapshot(struct callchain_cursor *dest,
185 struct callchain_cursor *src)
189 dest->first = src->curr;
190 dest->nr -= src->pos;
193 #ifdef HAVE_SKIP_CALLCHAIN_IDX
194 extern int arch_skip_callchain_idx(struct thread *thread, struct ip_callchain *chain);
196 static inline int arch_skip_callchain_idx(struct thread *thread __maybe_unused,
197 struct ip_callchain *chain __maybe_unused)
203 char *callchain_list__sym_name(struct callchain_list *cl,
204 char *bf, size_t bfsize, bool show_dso);
206 void free_callchain(struct callchain_root *root);
208 #endif /* __PERF_CALLCHAIN_H */